单项选择题

The __________ populated big cities are facing worsening environmental problems.

A．densely
B．abundantly
C．highly
D．intensely
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单项选择题
More off-shore scenic spots are __________ with the rapid development of transportation means.
A．available
B．convenient
C．achievable
D．accessible
单项选择题
It is a common __________ that people are inclined to do things that receive most praise.
A．sense
B．knowledge
C．phenomenon
D．learning
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